江汉大学学报(自然科学版) ›› 2017, Vol. 45 ›› Issue (6): 496-502.doi: 10.16389/j.cnki.cn42-1737/n.2017.06.003

• 光电化学材料与器件研究 • 上一篇    下一篇

C+Ag/Li4Ti5O12复合材料的制备和性能研究

程琦,涂吉,汤舜,赵金星,刘畅,黄高旭,梁济元,曹元成*   

  1. 江汉大学 光电化学材料与器件教育部重点实验室,化学与环境工程学院;柔性显示材料与技术湖北省协同创新中心,湖北 武汉 430056
  • 出版日期:2017-12-28 发布日期:2018-01-19
  • 通讯作者: 曹元成
  • 作者简介:程琦(1989—),男,硕士生,研究方向:锂离子电池材料及器件。
  • 基金资助:
    国家863 计划资助项目(20115AA033406);湖北省高等学校优秀中青年科技创新团队计划资助项目(T201318);武汉市应用基础研究项目(2015011701011593);武汉市第4批黄鹤英才计划以及江汉大学科研启动基金资助项目(08010001);江汉大学武汉研究院开放项目(IWSH2016348)

Sythesis and Electrochemical Performance of C+Ag/Li4Ti5O12 Compound Materials

CHEN Qi,TU Ji,TANG Shun,ZHAO Jinxing,LIU Chang,HUANG Gaoxu,LIANG Jiyuan,CAO Yuancheng?   

  1. Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education,School of Chemistry and Environmental Engineering,Flexible Display Materials and Technology Co-Innovation Centre of Hubei Province,Jianghan University,Wuhan 430056,Hubei,China
  • Online:2017-12-28 Published:2018-01-19
  • Contact: CAO Yuancheng

摘要: 以Li2CO3,锐钛矿纳米TiO2为原料采用高温固相法合成了微米级Li4Ti5O12负极材料,并将其与葡萄糖、AgNO3复合,制备出了C+Ag表面修饰的C+Ag/Li4Ti5O12复合材料。借助XRD、SEM、电化学工作站和充放电测试仪表征C+Ag/Li4Ti5O12材料的物理性能和电化学性能。结果表明:C+Ag 表面修饰的Li4Ti5O12复合材料有效提升了Li4Ti5O12的电化学性能。0. 1 C首次放电比容量为165. 8 mAh/g,5 C放电比容量仍可达到80 mAh/g。

关键词: 钛酸锂, 电导率, 掺杂, 包覆, 倍率

Abstract: C+Ag/Li4Ti5O12 micron size particles were synthesized as negative electrode materials with Li2CO3,anatase TiO2,glucose,AgNO3 as raw materials with a high temperature solid state reaction in an Ar atmosphere. The phase structure,morphologies and electrochemical properties of the materials were systematically characterized with XRD,SEM,electrochemical workstation,charge-discharge battery tester. The results demonstrated that C and Ag doped Li4Ti5O12 as the negative electrode materials of lithium-ion batteries had excellent electrochemical performances,C+Ag/Li4Ti5O12 exhibited a higher specific capacity,better cycling performance and better rate capability than those of pristine Li4Ti5O12. The initial discharge capacity reached 165. 8 mAh/g at 0.1C,and the discharge capacity still remained 80 mAh/ g at 5 C.

Key words: lithium titanate, electrical conductivity, doping, coating, rate capability

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